CODEWITHSUNDEEP
androidandroid-intentandroid-activitybroadcastreceiverflags
Arrigo Pierotti
Arrigo Pierotti

Reputation: 203

Multiple Intent flags for starting a new Activity in Android

I'm trying to add more flags at an Intent for launching a new Activity inside a BroadcastReceiver, responding to a particular intent sent from another part of the app. I've added as I noticed by the LogCat messages the FLAG_ACTIVITY_NEW_TASK flag at the Intent I created and then other ones but I get the same error in LogCat as the FLAG_ACTIVITY_NEW_TASK was not there.

Here's the code:

 public class actReceiver extends BroadcastReceiver {
 ...
    public void onReceive(Context context, Intent intent) {
    ...
     else if (intent.getAction().equals("something")) {
                Intent prefAct = new Intent(context, PreferencesActivity.class)
                prefAct.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                       .setFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS)
                       .setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY)
                       .setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
                startActivity(prefAct);
            }
     ... }
... }

And the particular LogCat error:

Caused by: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?

Upvotes: 3

Views: 4803

Answers (3)

user2907964
user2907964

Reputation: 19

simple way of doing it with kotlin and anko see snippet see example snapshot

startActivity(intentFor().clearTask().newTask().noHistory())

hope this helps

Upvotes: 0

Blackbelt
Blackbelt

Reputation: 157457

setFlags just assign the argument, as you can see from the snippet 

public Intent setFlags(int flags) {
    mFlags = flags;
    return this;
}

so in your case you are just assign the last one. To fix it put it on or

 prefAct.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS | Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_SINGLE_TOP);

or use addFlags which does the same thing

public Intent addFlags(int flags) {
    mFlags |= flags;
    return this;
}

Upvotes: 5

ci_
ci_

Reputation: 8774

use addFlags() instead of setFlags() to add additional flags.

http://developer.android.com/reference/android/content/Intent.html#addFlags(int)

setFlags() sets the complete set of flags to be used, so you would have to | all flags to be used in here. addFlags() can be called multiple times, and does the | of flags for you.

Upvotes: 2

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